will edwards on thu 22 mar 01
DELETE - This is once more a long winded post. Time to work the delete ke=
y
unless you have an interest in food service safty and glaze testing.
Thanks you Eduoard for this information. It is vital that these kinds of =
tests
are ran and studied in order to fully comprehend variances based on heat =
work
and transitions of metals. Your methods and work are highly appreciated!
I also note that my referencing information posted was not offered to any=
one
out there as being confrontational or warming up to anything. (John H.) I=
t
does not misconstrue any information if it is read carefully. It is based=
on
water quality measures which you and Ron were so fond of not so long ago.=
Also
I just disagree that lemon slices and vinegar will not be ample enough to=
provide positive results in place of lab reporting. If a glaze is so poor=
ly
formulated they need to see where the limits range is at in that glaze. (=
I'm
not saying that lemon slices and acidic fruits aren't a good way to deduc=
t the
worst case senario's in poorly devised mixes.) Telling someone to use fru=
it to
see if a glaze losses color could be misleading or misunderstood by some.=
A
person with Wilsons disease might not appreciate the fact they are reciev=
ing
an abundance of copper their bodies can't take! That issue wasn't as clea=
r to
me as apparently it should have been when the article was written on it. =
(Even
small amounts of copper to a person with Wilsons disease is too much)
Therefore what standards would "I" use to collect positive data for my ow=
n
research. (Standards based on water quality) It can be interpreted anyway=
you
choose but it is stringent enough to let one know the full monty. If I ca=
n
drag enough materials from the fired glaze to meet or exceed the
quantification guides set for H2O standards used by the USFDA and USEPA I=
have
a good working knowledge of how to lower my own materials in order to bal=
ance
out my glaze better. However they are ceramics extraction methods I will =
post
in the next few days with lab specs if and when I have the opportunity an=
d
time.
I also used to look at Frog-Ponds lab reporting to gain some of the
information I used at one point for purely personal reasons. I noted that=
they
too were based on water quality standards. Nice web site. It has been up-=
dated
since my last visit but it is a nice one! (Good job!)
Personally with the information I have it would take a real nasty glaze t=
o get
my attention long enough and hard enough for me NOT to eat off it. It sho=
uld
be noted that when an extraction as stringent as the ones I was providing=
as
information, only shows an over-supply of certain oxides I may be getting=
for
my daily dose of the minerals I am lacking. Of course I would need blood =
and
urine samples to find that out. Lead is a tad harder to extract like that=
once
it has entered the bones and becomes bound. Chelation isn't much good I a=
m
hearing?
Certain oxides in conjunction with other available materials can cause or=
create more lose of potential hazards (Minimal to heavy)in glazes by bind=
ing
or changing composition during firing. My research is currently based on =
that
and I am reporting back what the FDA approved facility provided me. I hav=
e on
hand at any time the results of my work based on lab research and analyti=
cal
methods used. I use several! I also am willing to help any person that is=
new
to glaze work about having glazes tested, what to expect, how to gain tha=
t
information and where to look for it and what not to be scared of. Chromi=
um 3
was suggested by one of the leading sources here recently about it being =
a
carcinogen and I can't find one person to back that up nor any pertinent
information to that accounting. I don't even want to go to the archives a=
nd
dig it out. But I can! I just think it would be confrontational and that =
is
not what my post is about. But since it was brought to my attention I
discussed it in lenght. I like Chromium, lots of it. I don't care much fo=
r the
fumes however. Lets be reasonable with this! Most are safe enough if used=
correctly. It needs to be inclusive from beginner to end-user. Mixer to m=
outh.
If we use exclusions we miss some of the potential to learn from it. I ho=
pe
that was not mis-leading to anyone?
Also very few materials are currently limited in the role of finished war=
es
with exception to lead, cadmium and a few others. Lithium and barium and
others are being considered however and more will follow in time as we se=
e
changes made unless we learn quickly how to put our materials out there i=
n
good order. As my post also suggested many of the finishing remarks state=
d
which of these minerals we need in order to sustain healthy bones, tissue=
s and
over-all good health. (Remember how well flouride used to be sold by our =
own
governing bodies?) I have even laughed with others in regards to getting =
my
daily supply of minerals from plates that were made with leachates such a=
s
this. However it wouldn't be as funny to someone who has an immune compro=
mised
health problem or sensitivity to trace amounts of certian substances. Its=
sorta like sea-food. Some people can't even be around it and yet allot of=
it
contains copper. I can't account for all the allergies out there but I ca=
n
account for my end users results by supplying adequate results via approv=
ed
testing facilities on my materials as I make them. I been doing that for =
over
20 years now in some form. Food service just happens to be the one thing =
I did
major in and even though at the time we studied micro-organisms and bacte=
rias
among a host of other things, it is within my knowledge to know they are =
other
issues that can lead to factors such as crazing where bacterial growth ca=
n
happen. Leaching oxides are only one of the factors I was making note of.=
I wrote the FSIS and will be awaiting their reply for further development=
of
this conversation. Also it should be noted that most of the materials lis=
ted
were for speculation and personal use by which ever individual is learnin=
g to
use calculations and tools for creating a good glaze. It wasn't supplied =
as
toxiclogical evaluation as I stated, I am not a toxicologist. I only have=
worked with them for nearly half my life off and on. =
No one should be scared to ask any question what-so-ever on clayart or ha=
ve
any issues by the thought of asking a question where any concern regardin=
g
safety should be considered. We have toxicologists and M.D's here that ca=
n
enlighten us. The chemical engineers and other people are really great as=
sets
for calculations and determining out-comes as well. It takes a concerted
effort for all of us to work closely together, not pull or pick every bon=
e
thrown out there to death. Continued research and studies of all this is =
what
leads to discovery. Without someone asking question it is doubtful many
discoveries would be made. So please ask questions and don't be alarmed b=
y the
facts. It takes examination and many factors to provide full insight to t=
his
information at times.
William Edwards
Alchemy 101 - I have yet to find a plate I wouldn't eat off of. I might o=
nly
eat certain food off it, but I would certainly give most of them a try if=
the
cooking was good. (Am I worried?) Nah - I need the extra minerals to keep=
this
up. But please leave the lead out! It sours my stomach. But would I let a=
3
year old child place O.J. in a glass made with an unknown glaze that migh=
t sit
for a day prior to them drinking from it? Well it all depends. remember -=
little people are metabolizing faster than we old folks are. they store t=
hings
quickly and effectively in their fast growing bodies. (Please read up on =
that
with open mind) Compromised immunity disorders might as well be given a s=
econd
thought as well.
EB ...After having given him all the necessary information on pottery mak=
ing =
technology he concluded that it is impossible to produce hexavalent chrom=
ium
in our kilns.
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1
Ababi on thu 22 mar 01
>From: "will edwards"
>Subject: Chromium 3-4 Also glaze materials again. Long
>DELETE - This is once more a long winded post. Time to work the delete key
>unless you have an interest in food service safety and glaze testing.
Hello Will!
This subject, the Chromium as a very unsafe material is too serious to
delete, however and I don't mean to be mean, when I read such a long letter,
(in a foreign language) I forget what it is about!
Let's see if I understood clear.You love Chrome and it is hard to give it
up?
Try smaller amounts +rutile or rutile with copper or copper and chrome and
don't use it inside any dishes where it might be connecting food, or if I
did not understand at all, delete my letter.
Ababi Sharon
ababisha@shoval.ardom.co.il
http://members4.clubphoto.com/ababi306910/
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